Description

In which John Cena asked the age-old question, “Why do we have butts?” and I went on an epic mission to find out. My journey took me from the simplest of creatures in the ancient seas to a lab at George Washington University—and finally to the earliest stages of human development.
Subscribe to Anna's Science Magic Show Hooray! https://bit.ly/2LLNAci

Want more Science Magic Show? Check out "Why am I so sweaty?"
https://youtu.be/AMZc4hWJ0ik

Do you have a science question? Let me know! I’d love to answer it in a future video. Drop it in the comments or find me on Twitter, Instagram, or Facebook.